## Contents on 6 August '10

- IAU Minor Planet Center
- NEOCP Activity --
*eight listings: 4 new, 4 updated* - New MPECs --
*seven MPECs*

- NEOCP Activity --
- Observers --
*fifteen observing facilities* - Impact Risk Monitoring --
*one object* - Chronology

**Resources:**

- Consolidated Risk Tables - the CRT page

Of 321 risk-listed objects, 16 have had news in the last month. Updated at 1634 UTC. - Earth's Busy Neighborhood Traffic Report

No objects are known to be within ten LD of Earth today. Updated at 2145 UTC. - Ephemerides for risk-rated and nearby objects
- News image catalog
- Old & new CRT Archive
- Old News Archive & Small Objects Archive

**The latest A/CC news** is available via framed access, RSS news feed, or redirection. - Note: A/CC has a main Web site and also a backup site with its own duplicate RSS news feed.

**Navigation tips:** Use the << and >> arrows on the menus for each regular section (Observers, Risks, etc.) to move to the previous and next day's news for that section. Use the Index menu item to access specific days through a calendar interface. And use the all-up news archive to access news from any time since A/CC began in early 2002. To keep track of what's new each day, watch the Chronology section.

## NEOCP Activity on 6 August '10

### The MPC's NEO Confirmation Page has 8 listings: 4 new, 4 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had four new and four updated listings. Of these, five were "one nighters." So far ** The Tracking News** has counted a total of seventeen listings on the NEOCP at some point today.

To learn how observers use the NEOCP, see the Practical guide on how to observe NEOCP object at Suno Observatory by Birtwhistle *et al.*

## New MPECs on 6 August '10

### Minor Planet Electronic Circulars

As of last check at 2358 UTC, there have been seven MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

- MPEC 2010-P25 time-stamped "06:10 UT" - Daily Orbit Update - see below
- MPEC 2010-P26 time-stamped "14:30 UT" - Comet C/2010 L4 (WISE) - see below
- MPEC 2010-P27 time-stamped "21:27 UT" - 2010 PH9 - see below
- MPEC 2010-P28 time-stamped "21:29 UT" - 2010 PJ9 - see below
- MPEC 2010-P29 time-stamped "21:31 UT" - 2010 PK9 - see below
- MPEC 2010-P30 time-stamped "21:33 UT" - 2010 PL9 - see below
- MPEC 2010-P31 time-stamped "21:35 UT" - 2010 PM9

#### MPEC 2010-P31 - "21:35 UT" - 2010 PM9

`K10P09M`**2010 PM9**(Q=4.657 AU, H=19.6 ~407m) was**discovered**at 0929 UT on 5 Aug. by LINEAR, which observed it at Aug. 5.40-44p4. The discovery was confirmed by Moriyama Obs. (Aug. 6.71-73p3).

#### MPEC 2010-P30 - "21:33 UT" - 2010 PL9

`K10P09L`**2010 PL9**(H=20.1 ~323m) was**discovered**at 0805 UT on 5 Aug. by LINEAR, which observed it at Aug. 5.34-38p5. The discovery was confirmed by Moriyama Obs. (Aug. 6.68-69p3) and Shenton Park Obs. (Aug. 6.79-81p5).

#### MPEC 2010-P29 - "21:31 UT" - 2010 PK9

`K10P09K`**2010 PK9**(borderline-small, q=0.224 AU, Earth MOID=6.2 LD, H=21.9 ~141m) was**discovered**at 0639 UT on 5 Aug. by LINEAR, which observed it at Aug. 5.28-33p5. The discovery was confirmed by Shenton Park Obs. (Aug. 6.60-61p3 & 6.79p2), Moriyama Obs. (Aug. 6.64-65p3), Castelmartini Obs. (Aug. 6.86p5), Schiaparelli Obs. (Aug. 6.87-88p5), and Libbiano Obs. (Aug. 6.87-88p3).

#### MPEC 2010-P28 - "21:29 UT" - 2010 PJ9

`K10P09J`**2010 PJ9**(small asteroid, Earth MOID=1.4 LD, H=24.6 ~41m) was**discovered**at 0630 UT on 5 Aug. by LINEAR, which observed it at Aug. 4.28-33p5 and 5.27-32p10. The discovery was confirmed by Shenton Park Obs. (Aug. 6.61-62p3) and Moriyama Obs. (Aug. 6.66-67p4). This object will be coming within ten lunar distances (LD) of Earth, reaching 2.9 LD on 10 Aug.

#### MPEC 2010-P27 - "21:27 UT" - 2010 PH9

`K10P09H`**2010 PH9**(small asteroid, Earth MOID=6.3 LD, H=26.5 ~17m) was**discovered**at 0647 UT on 4 Aug. by LINEAR, which observed it at Aug. 4.28-33p5 and 5.27-32p5. The discovery was confirmed by Shenton Park Obs. (Aug. 6.85-87p5). This object is now within ten lunar distances (LD) of Earth, reaching 6.3 LD on 5 Aug.

#### MPEC 2010-P26 - "14:30 UT" - Comet C/2010 L4 (WISE)

`CK10L040`**C/2010 L4 (WISE)**(i=102.8°, q=2.826 AU, Q=157.020 AU, TP=2010 Feb. 23.6700 TT) from Cielo Profundo Obs. (July 25.00-02p3) and Frasso Sabino Obs. (Aug. 4.88-89p3)

#### << DOU on 6 Aug. '10 >> MPEC 2010-P25 - "06:10 UT" - Daily Orbit Update

- Observations of risk-listed objects
`K10K00H`**2010 KH**(Q=4.284 AU, arc=81 days, H=18.5 ~676m) from WISE (Aug. 3.62p1, 3.75p1, 3.88p1, 4.02p1, 4.15p1, 4.28p2, 4.41p1, 4.54p1, 4.68p1, 4.81p1 & 4.94p1)- Observations of small asteroids (H>22.0)
`K10P02O`**2010 PO2**(arc=3 days, H=23.4 ~71m) from Astronomical Research Obs. Westfield (Aug. 5.21-22p3)- Observations of other objects
`K10P02P`**2010 PP2**(arc=2 days, H=21.1 ~204m) from Shenton Park Obs. (Aug. 5.68p2)`K10OA1N`**2010 ON101**(arc=5 days, H=20.7 ~245m) from ARO Westfield (Aug. 5.20-21p3)`K10OA1L`**2010 OL101**(Q=4.145 AU, arc=10 days, H=20.3 ~295m) from the Spacewatch 0.9m telescope (Aug. 6.23p2)`K10OA1F`**2010 OF101**(arc=12 days, H=19.5 ~426m) from WISE (Aug. 2.53p1, 2.66p1, 2.93p1, 3.13p1, 3.33p2, 3.39p1, 3.46p1, 3.66p1, 3.72p1, 3.79p1, 3.92p1 & 4.05p1)`K10OA1D`**2010 OD101**(arc=13 days, H=20.9 ~224m) from Spacewatch 0.9m (Aug. 5.33p2)`K10OA0L`**2010 OL100**from Spacewatch 0.9m (Aug. 5.16p2)`K10O22E`**2010 OE22**(Q=4.297 AU, arc=19 days, H=21.5 ~170m) from Spacewatch 0.9m (Aug. 5.25p2) and the Spacewatch 1.8m telescope (Aug. 5.28-29p3)`K10N01Z`**2010 NZ1**(arc=27 days, H=19.7 ~389m) from Spacewatch 1.8m (Aug. 5.36-37p3)`K10N01W`**2010 NW1**(i=39.6°, Q=5.496 AU, arc=31 days, H=17.8 ~933m) from Spacewatch 1.8m (Aug. 5.43-44p3)`K10N01G`**2010 NG1**(arc=35 days, H=20.3 ~295m) from Spacewatch 0.9m (Aug. 5.19p3)`K10M51N`**2010 MN51**(arc=42 days, H=18.4 ~708m) from Kevin Hills via RAS Obs. Moorook (Aug. 4.69-72p3)`K10M01F`**2010 MF1**(arc=48 days, H=19.6 ~407m) from Wishing Star Obs. (Aug. 6.04-05p3)`K10LA8U`**2010 LU108**(Q=4.072 AU, arc=51 days, H=20.0 ~339m) from Spacewatch 1.8m (Aug. 6.23-24p3)`K10LA8T`**2010 LT108**(arc=53 days, H=19.8 ~371m) from Spacewatch 1.8m (Aug. 5.26p2)`K10L14J`**2010 LJ14**(arc=62 days, H=17.9 ~891m) from Spacewatch 1.8m (Aug. 6.20-21p3)`K10JF3V`**2010 JV153**(arc=92 days, H=20.0 ~339m) from Spacewatch 1.8m (Aug. 6.18-19p3)`K10JF1M`**2010 JM151**(arc=83 days, H=19.7 ~389m) from Spacewatch 0.9m (Aug. 5.41-42p3)`K10J71N`**2010 JN71**(arc=38 days, H=21.4 ~178m) from WISE (May 12.11p1, 12.24p1, 12.44p1, 12.51p1, 12.64p1 & 12.71p1)`K10J00E`**2010 JE**(Q=4.603 AU, arc=95 days, H=20.2 ~309m) from Spacewatch 0.9m (Aug. 6.20-21p3)`K10G62X`**2010 GX62**(Q=5.033 AU, arc=180 days, H=20.2 ~309m) from WISE (April 11.17p1)`K10G62W`**2010 GW62**(arc=72 days, H=19.4 ~446m) from WISE (April 10.63p1)`K10G33O`**2010 GO33**(Q=4.092 AU, arc=38 days, H=19.2 ~490m) from WISE (May 10.39p1, 10.52p1, 10.59p1, 10.65p1, 10.72p1, 10.79p1, 10.85p1, 10.99p1 & 11.12p1)`K10G23K`**2010 GK23**(Q=5.181 AU, arc=8 days, H=19.7 ~389m) from WISE (April 4.93p1, 5.07p1, 5.13p1 & 5.53p1)`K10G07R`**2010 GR7**(q=0.281 AU, arc=48 days, H=18.4 ~708m) from WISE (May 12.91p1, 13.04p1, 13.10p1, 13.17p1, 13.24p1 & 13.37p2)`K10D01W`**2010 DW1**(arc=2 opp, H=20.1 ~323m) from WISE (Jan. 29.40p1, 29.53p1, 29.66p1, 29.79p1, 29.92p1, 30.06p1, May 12.98p1, 13.11p1, 13.18p1, 13.31p1, 13.38p1 & 13.45p1)`K09X02C`**2009 XC2**(Q=4.187 AU, arc=3 opp, H=17.1 ~1.29 km) from WISE (April 22.75p1, 22.88p1, 23.01p1, 23.14p1, 23.27p1, 23.34p1, 23.41p1, 23.47p1, 23.54p1, 23.61p1, 23.67p1, 23.74p1, 23.80p1, 24.13p2, 24.27p1 & 24.40p1)`K09SA3O`**2009 SO103**(arc=2 opp, H=17.4 ~1.12 km) from WISE (April 21.29p1, 21.42p1, 21.48p1, 21.55p1, 21.62p1 & 21.75p1)`K09K03C`**2009 KC3**(Q=5.447 AU, arc=2 opp, H=18.0 ~851m) from WISE (Jan. 31.01p1, 31.14p1, 31.27p1, 31.34p1, 31.54p1, 31.67p1, 31.74p1, Feb. 1.00p1 & 1.14p1)`K09J02O`**2009 JO2**(arc=2 opp, H=19.2 ~490m) from WISE (July 30.35p1, 30.62p1, 31.02p1, 31.08p1, 31.15p1, 31.35p1, 31.48p1 & 31.74p1)`K09A00V`**2009 AV**(i=45.9°, arc=2 opp, H=17.9 ~891m) from WISE (Aug. 1.17p2, 1.30p1, 1.43p1, 1.50p1, 1.56p1, 1.63p1, 1.70p2, 1.76p1, 1.83p1, 1.89p1, 1.96p1, 2.09p1 & 2.16p1)`K07X10C`**2007 XC10**(i=47.9°, arc=2 opp, H=19.4 ~446m) from WISE (Feb. 1.59p1, 1.72p1, 1.92p1, 1.99p1, 2.06p1, 2.12p1, 2.19p1, 2.25p1, 2.32p1, 2.39p1, 2.45p1, 2.58p1 & 2.72p1)`K07M13K`**2007 MK13**(arc=3 opp, H=20.0 ~339m) from WISE (April 5.26p1, 5.39p1, 5.53p1, 5.66p1 & 5.79p1)`K06W02Z`**2006 WZ2**(arc=4 opp, H=16.8 ~1.48 km) from WISE (April 25.93p1, 26.20p1, 26.53p1, 26.66p1, 26.73p1, 26.79p1, 26.86p1, 26.92p1, 26.99p1, 27.06p1, 27.19p1 & 27.72p1)`K06W02Y`**2006 WY2**(arc=4 opp, H=18.5 ~676m) from WISE (Feb. 2.65p1, 2.79p1, 2.92p1, 3.05p1, 3.12p1, 3.18p1, 3.25p1, 3.32p1, 3.38p1, 3.45p1, 3.51p1, 3.65p1, 3.78p1, 3.91p1 & 4.04p1)`K06O10U`**2006 OU10**(arc=3 opp, H=17.8 ~933m) from WISE (April 6.68p1, 6.75p1, 6.82p1, 6.95p1, 7.21p1 & 7.35p1)`K06K01D`**2006 KD1**(Q=4.430 AU, arc=3 opp, H=17.2 ~1.23 km) from WISE (May 9.68p1, 9.81p1, 9.94p1, 10.07p1 & 10.14p1)`K06E01E`**2006 EE1**(i=36.4°, arc=2 opp, H=19.8 ~371m) from WISE (Feb. 2.76p1, 2.83p1, 2.89p1, 2.96p1, 3.03p1 & 3.09p1)`K06B07T`**2006 BT7**(arc=5 opp, H=18.3 ~741m) from WISE (April 5.25p1 & 5.38p1)`K05Q00L`**2005 QL**(arc=2 opp, H=18.7 ~616m) from WISE (April 10.61p1, 10.75p1, 10.88p1, 11.01p1, 11.27p1 & 11.61p1)`K05N01P`**2005 NP1**(arc=3 opp, H=18.7 ~616m) from WISE (April 4.96p1, 5.16p1, 5.23p1, 5.36p1, 9.26p1, 9.53p1, 9.66p1, 9.86p1, 9.93p1, 10.06p1, 10.12p1, 10.32p1, 10.39p1, 10.65p1, 10.79p1, 10.92p1, 11.18p1, 11.31p1 & 11.45p1)`K05EV8D`**2005 ED318**(arc=2 opp, H=20.8 ~234m) from WISE (May 12.76p1, 12.90p2, 13.03p2, 13.16p2, 13.29p2, 13.36p1, 13.43p2 & 13.49p1)`K04V60T`**2004 VT60**(i=43.5°, arc=4 opp, H=17.6 ~1.02 km) from WISE (May 12.27p1, 12.54p1, 12.67p1, 12.94p1, 13.00p1 & 13.33p1)`K04E09U`**2004 EU9**(arc=4 opp, H=18.9 ~562m) from WISE (April 21.48p1, 21.61p1, 21.68p1, 21.74p1, 21.81p1, 21.88p1, 21.94p1, 22.08p2, 22.14p1, 22.21p2, 22.27p1 & 22.34p1)`K03U12L`**2003 UL12**(Q=5.602 AU, arc=3 opp, H=17.2 ~1.23 km) from WISE (Jan. 31.11p1, 31.64p1, 31.71p1, 31.77p1, 31.84p2, 31.90p1, 31.97p1 & Feb. 1.10p1)`K03H00B`**2003 HB**(arc=3 opp, H=19.7 ~389m) from WISE (May 3.44p1, 3.57p1, 3.71p1, 3.90p1, 3.97p1, 4.04p2, 4.17p1, 4.37p1, 4.50p1, 4.63p1 & 4.76p2)`K02T57Y`**2002 TY57**(arc=4 opp, H=19.2 ~490m) from Spacewatch 1.8m (Aug. 5.36-37p3)`K01A02D`**2001 AD2**(q=0.354 AU, arc=4 opp, H=19.3 ~467m) from WISE (Jan. 31.11p1, 31.24p1, 31.50p2, 31.64p1, 31.77p1, 31.90p1, Feb. 1.03p1, 1.56p1, 1.63p1, 3.61p1, 3.75p1, 3.88p1, 4.01p1 & 4.14p1)`J99J06R`**1999 JR6**(arc=3 opp, H=18.1 ~812m) from WISE (May 9.53p1, 9.59p1, 9.66p1, 9.72p1, 9.79p1, 9.86p1, 9.92p1, 9.99p2, 10.05p1 & 10.25p1)`O3025`**243025 2006 UM216**from Frasso Sabino Obs. (Aug. 4.90p3)`D8404`**138404 2000 HA24**from Pallerols Obs. (Aug. 4.93p1 & 5.01-04p2)`B1253`**111253 2001 XU10**from Castelmartini Obs. (Aug. 4.08-09p3)

## Observers on 6 August '10

Fifteen observing facilities appear in today's MPECs.

Code | Observer / observatory |
---|---|

H21 | Astronomical Research Obs. Westfield in Illinois, 2 in MPEC 2010-P25 -- 2010 PO2, 2010 ON101 |

160 | Castelmartini Obs. in Italy, 2 in MPECs 2010-P25 & 2010-P29 -- 2010 PK9, 111253 |

J01 | Cielo Profundo Obs. in Spain, 1 in MPEC 2010-P26 -- C/2010 L4 |

157 | Frasso Sabino Obs. in Italy, 2 in MPECs 2010-P25 & 2010-P26 -- C/2010 L4, 243025 |

704 | LINEAR in New Mexico, 5 in MPECs 2010-P27, 2010-P28, 2010-P29, 2010-P30 & 2010-P31 -- 2010 PM9, 2010 PL9, 2010 PK9, 2010 PJ9, 2010 PH9 |

B33 | Libbiano Obs. in Italy, 1 in MPEC 2010-P29 -- 2010 PK9 |

900 | Moriyama Obs. in Japan, 4 in MPECs 2010-P28, 2010-P29, 2010-P30 & 2010-P31 -- 2010 PM9, 2010 PL9, 2010 PK9, 2010 PJ9 |

C27 | Pallerols Obs., 1 in MPEC 2010-P25 -- 138404 |

D90` | Kevin Hills in England via RAS Obs. Moorook in South Australia, 1 in MPEC 2010-P25 -- 2010 MN51 |

204 | Schiaparelli Obs. in Italy, 1 in MPEC 2010-P29 -- 2010 PK9 |

D21 | Shenton Park Obs. in Western Australia, 5 in MPECs 2010-P25, 2010-P27, 2010-P28, 2010-P29 & 2010-P30 -- 2010 PP2, 2010 PL9, 2010 PK9, 2010 PJ9, 2010 PH9 |

691 | Spacewatch 0.9m telescope in Arizona, 7 in MPEC 2010-P25 -- 2010 OL101, 2010 OL100, 2010 OE22, 2010 OD101, 2010 NG1, 2010 JM151, 2010 JE |

291 | Spacewatch 1.8m telescope in Arizona, 8 in MPEC 2010-P25 -- 2010 OE22, 2010 NZ1, 2010 NW1, 2010 LU108, 2010 LT108, 2010 LJ14, 2010 JV153, 2002 TY57 |

C51 | WISE in Earth polar orbit, 31 in MPEC 2010-P25 -- 2010 OF101, 2010 KH, 2010 JN71, 2010 GX62, 2010 GW62, 2010 GR7, 2010 GO33, 2010 GK23, 2010 DW1, 2009 XC2, 2009 SO103, 2009 KC3, 2009 JO2, 2009 AV, 2007 XC10, 2007 MK13, 2006 WZ2, 2006 WY2, 2006 OU10, 2006 KD1, 2006 EE1, 2006 BT7, 2005 QL, 2005 NP1, 2005 ED318, 2004 VT60, 2004 EU9, 2003 UL12, 2003 HB, 2001 AD2, 1999 JR6 |

I15 | Wishing Star Obs. in Rhode Island, 1 in MPEC 2010-P25 -- 2010 MF1 |

For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page. |

## Impact Risk Monitoring on 6 August '10

0000NNN000 Object | Risk Monitor | When Noted UTC | 0000T0000 Year Range | VI # | 000NN00 Prob Cum | T0000 PS Cum | T0000 PS Max | T S | Notes for Today's Latest Risk Assessments |

2010 KH | JPL Sentry | 1634 | R E M O V E D | JPL: Risk listing removed at 0949 UTC. | |||||

NEODyS | 1634 | R E M O V E D | - |

**Legend:** VI# = VI count, Prob Cum = cumulative probability, PS Cum/Max = cumulative/maximum Palermo Scale, TS = Torino Scale

An impact solution, also known as a "virtual impactor" (VI), is not a prediction but rather a possibility derived from a variant orbit calculation that cannot be eliminated yet based on the existing data. Elimination can come quickly with just a little further observation or may take weeks or months, sometimes years. Once superceded or eliminated, a former impact solution has zero relevance to an object's risk. See Jon Giorgini's "Understanding Risk Pages" to learn more.

## Chronology on 6 August '10

Times are UTC for when items were noted or added by ** The Tracking News**.

2228 | Grabbed MPEC 2010-P29 - 2010 PK9 - see above Grabbed MPEC 2010-P30 - 2010 PL9 - see above Grabbed MPEC 2010-P31 - 2010 PM9 - see above |

2130 | Grabbed MPEC 2010-P27 - 2010 PH9 - see above Grabbed MPEC 2010-P28 - 2010 PJ9 - see above |

1634 | Noted that JPL Sentry has removed 2010 KH as an impact risk - see above Noted that NEODyS has removed 2010 KH as an impact risk - see above Grabbed MPEC 2010-P25 - Daily Orbit Update - see above Grabbed MPEC 2010-P26 - Comet C/2010 L4 (WISE) - see above |